Compound for cleaning



Patented Mar. .4, 1930 UN TE STATES PATENT OFFICE CHARLES G. CKEVALIEQOI BALTIMORE, MARYLAND conrom iron cnmnmo 80 Drawing. Application filedflay 5,

I tinlplate, or other rolled sheet metal.

11 the processes used for manufacturing tinplate, the finished sheetsgenerally have a thin film of oil adhering thereto. Such a film preventssuccessful soldering operations on articles made from such oily sheets,and

also prevents a perfect coatin or printed impressions being made on sucarticles.

One methad used for cleaning oily. sheets has been to place such sheetsin a machine 15 containing a batch of the: coarser part of ground wheatiwhich is generall called middlings. At first this works fairly well,but after about twenty minutes these middlings lose their cleanin thesheets come outwith a thin film of oil or grease still adhering thereto.Many shipments are returned to the manufacturers for re-cleaning,because of such films.

newal of the middlings requires'the sto ping of'the machine, the removalof the o d' exhausted batch and its replacement with a fresh batch.'Such frequent renewals are obviously objectionable and increase the costof cleaning. a A new type of cleaning machine has been perfected whichpermits the replacement of an exhausted batch with a fresh one, withoutstopping the machine.

I ave a small amount of powdered diatomaceous earth, a new result isobtained. With my compound the interval between renewals of themiddlings may be increased from twenty minutes to five hours, or aboutfifteen times, with satisfactory results. The action of this smallamount of earth seems 'to be to scrape the oil film from the plate, andthat when so removed this oil is much more readily absorbed by themiddlings. The amount of this diatomaceous earth which I have found togive satisfactory results is from one per- "cent to' five percent, byweight, to eachbatch ofmiddlings. I

power, with the zoresult that if the process 1s continued longer Withthe machine formerly used each rediscovered that w1th the addition ofabsorbent material to which has 'diatomaceous earth. I 2. An oilremoving and surface pohshin 1920. Serial Io. sauna.

Diatomaceous earth also has a ca acity for absorbing 011 and grease,and, i desired,

larger proportions of it .may be used in ,my

COIVOUJI ith my compound the tinplate sheet may be freed entirely fromoil or grease,'leaving the surface in the pro er condition for sub"-sequent soldering or ecorating of articles made therefrom. With theadvantage of this more perfect cleaning and polishing of the sheets,there is obviousl a great saving in the cost over using midd ings alone;

' The cost of my process is further reduced because after the middlingsand powdered diatomaceous earth have taken up all the oil which thecompound is capable of removin satisfactorily, it may be sold as acattle fee as alm'o-middlings. r

* arious modifications ofv my invention within the scope ofthe claimsmay be made,

for instance the method may be used. to clean articles which are not inthe shape of sheets, and to remove any other coating which the middlingsare capable of absorbing.

Neither the earth, middlings or oil can be readily se arated orrecovered and used again, an in view of the market for this cattle feed,there seems to be no need for doing so.

Varin conditions such as the smoothness of the 'ro led sheets upon whichthe tin coating is formed, the quality; and temperature of the oil, makeit necessaryto vary the period of use of my compound to meet suchconditions.

What I claimis:

1. An oil removing and surface polishing compound consisting of a finelydivided oil been added compound consisting of middlin to whic from oneto five percent pf diatomaceous earth has been added. 3. An oil removingand surface polishing 9 compound consisting of middlings and diato- Imaceous earth.

In testimony whereof Ihereunto aifix my signature. i

g CHARLES G. CHEVALIER. 10o

